The first-generation iPhone SE is a smartphone that was developed and marketed by Apple. It is part of the 9th generation of the iPhone alongside the higher-end iPhone 6s and 6s Plus. It was introduced on March 21, 2016, with pre-orders beginning on March 24, 2016, and was officially released on March 31, 2016, alongside the 9.7-inch iPad Pro. It was re-released on March 24, 2017, with larger storage capacities.